YH4
GRAND
VITARA
For CAMI production vehicle
For IWATA production vehicle
1B-12 AIR CONDITIONING (OPTIONAL)
PERFORMANCE DIAGNOSIS
1) Confirm that vehicle and environmental conditions are as fol-
lows.
D Vehicle is not exposed to direct sun.
D Ambient temperature is within 15_C – 35_C (59_F – 95_F).
2) Make sure that high pressure valve (1) and low pressure valve
(2) of manifold gauge are firmly closed.
3) Connect high pressure charging hose (3) to high pressure ser-
vice valve (5) on vehicle, and connect low pressure charging
hose (4) to low pressure service valve (6) on vehicle.
4) Bleed the air in charging hoses (3), (4) by loosening their respec-
tive nuts on manifold gauge, utilizing the refrigerant pressure.
When a hiss is heard, immediately tighten nut.
CAUTION:
Do not interchange high and low pressure charging
hoses by mistake.
5) Warm up engine to normal operating temperature (engine cool-
ant temperature at 80 – 90_C (176 – 194_F)) and keep it at spe-
cified idle speed. (Radiator cooling fan should not be working
when checking pressure and temperature.)
6) Turn A/C switch ON, and set blower switch at “HI” (4th position),
temperature control knob at “COOL”, air outlet control knob at
“FACE”, fresh/circulation control knob at “CIRCULATION”.
(Confirm that A/C compressor and condenser fan are working.)
7) Keep all windows, doors and engine food open.
Ambient temperature
15 – 35_C (59_F – 95_F)
Engine rpm Keep to 1,500 rpm.
Blower motor switch Max. (4th position)
Temperature control Max. cool
Air outlet control Face
Vehicle doors All open
Air inlet door position Recirculation
8) With about 20 mm (0.8 in.) of dry bulb thermometer (1) inserted
into center duct air outlet and another one set near evaporator
air inlet, read temperature indicated on each thermometer.
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